New Psych Note 103008

New Psych Note 103008 - Note 10/30/08 Caffeine A....

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Note 10/30/08 Caffeine A. Prevalence 1. Caffeine is the most ubiquitous psychoactive substance 2. Possibly used since 6,000 BC 3. Americans consume 1 billion kg of coffee/yr 4. Americans drink 40 gallons of soda/person annually 5. Adds up to ~250 mg/person daily B. Methylxanthines 1. Group of natural stimulants found in coffee, tea, sodas, chocolate, and guarana 2. Caffeine Only methylxanthine use for psychostimulant properties Central nervous system stimulant 3. Theophylline Small amounts found in tea Similar effects to caffeine, about as equally potent in producing CNS stimulation Bronchial dilation and used in asthma treatment 4. Theobromine High amount in chocolate- very toxic to dogs Doesn’t cross blood-brain barrier well; not as psychoactive. C. Caffeine Sources 1. Coffee Bush grows in warm climates Berries opened to reveal coffee bean dried and ground
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Two types of plants - Arabica a. Delicate plant b. Milder flavor, lower caffeine: 1 percent c. More commonly used d. Derived mainly from South America - Robusta a. Hardier plant b. Harsher flavor c. Instant coffee and blends d. Twice as much caffeine, 2 % caffeine e. Derived from Southeast Asia - Tea a. Varieties of evergreen b. Leaves dried and steeped in water - Chocolate a. From a tree b. Kernels of beans roasted, fat and powder separated
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This note was uploaded on 04/29/2010 for the course PSYCH PSYCH 179 taught by Professor Koob during the Fall '09 term at UCSD.

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New Psych Note 103008 - Note 10/30/08 Caffeine A....

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